Last year I had the cutest little boy in my class, and he had darker hair so it sometimes looked as if he had a small mustache. He didn't really, but because his hair was so dark, it often times appeared so.
Well I also had another little boy who was rather animated and very friendly. One day we were lining up for lunch, and I heard my animated boy urgently yell my name from the line. I quickly walked over to see what it was, and he was facing my student with very dark hair. The friendly little boy excitedly glanced up at me and said, "Look, Ms. Guinn..." (and while reaching up to tickle the other little boys "whiskers" said...) "he has a little mustache!"